What about for an experiment? Two years ago I found a Russian-only text I wanted to read on a programming language called DRAKON. I translated the PDF into English and made a simultaneous English / Russian text to speech (one for each ear) and laid out the text side-by-side.

I was going to do the whole book this way, but once I had “proof of concept”, I was satisfied gave the English PDF translation to the Russian author (who didn’t know I did this and was impressed),

I don’t know what result I expected when hearing both at the same time like this would do, but i had to try at least.